RELATIONSHIPS BETWEEN CONVOLUTION AND CORRELATION FOR FOURIER TRANSFORM ANDQUATERNION FOURIER TRANSFORM

In this paper we introduce convolution theorem for the Fourier transform (FT) of two complex functions. We show that the correlation theorem for the FT can be derived using properties of convolution. We develop this idea to derive the correlation theorem for the quaternion Fourier transform (QFT) of the two quarternion function